I came across this screen capture I made in 2003 when I was using Powerpoint in the Classic environment in OS X. I have no idea what conditions made the easter egg appear, and I couldn’t replicate it (choosing ‘Save’ again after cancelling brought up the correct list of files). “Moof” is the name Clarus (the dogcow) makes, Clarus being the mascot of Apple’s dev tech support group.